CN113482813B - Air inlet channel, engine and vehicle - Google Patents
Air inlet channel, engine and vehicle Download PDFInfo
- Publication number
- CN113482813B CN113482813B CN202110739779.9A CN202110739779A CN113482813B CN 113482813 B CN113482813 B CN 113482813B CN 202110739779 A CN202110739779 A CN 202110739779A CN 113482813 B CN113482813 B CN 113482813B
- Authority
- CN
- China
- Prior art keywords
- air inlet
- air
- cross
- section
- mounting pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10019—Means upstream of the fuel injection system, carburettor or plenum chamber
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an air inlet channel, an engine and a vehicle, wherein the air inlet channel comprises a main channel and two air channel branches, the main channel is close to the air inlet end of the air inlet channel, the two air channel branches are close to the air outlet end of the air inlet channel, the two air channel branches are respectively provided with an oil injector mounting pipe for mounting an oil injector and an air inlet valve mounting pipe for mounting an air inlet valve, and each oil injector mounting pipe and each air inlet valve mounting pipe are communicated with the air channel branch where the oil injector mounting pipe and the air inlet valve mounting pipe are located; the fuel injector mounting pipe and the intake valve mounting pipe are arranged at angles with the air passage branch respectively, an included angle exists between the axis of the fuel injector mounting pipe and the axis of the intake valve mounting pipe, the included angle between the fuel injector mounting pipe and the air passage branch is smaller than that between the intake valve mounting pipe and the air passage branch, the fuel injector can be guaranteed to be close to a combustion chamber as far as possible, the evaporation effect of fuel at an intake passage is obviously improved when fuel beams fall on the back of the intake valve, so that fuel enters a cylinder to participate in combustion as much as possible, and the economy of an engine is improved.
Description
Technical Field
The invention relates to the technical field of engine combustion chamber systems, in particular to an air inlet channel, an engine and a vehicle.
Background
The existing cylinder cover combustion chamber system mostly adopts two modes of direct injection in a cylinder and air passage injection. The technology is favorable for improving the dynamic property and the economical efficiency of the engine, but has high cost, easy carbon deposition and engine oil dilution, and the air inlet valve seat is not lubricated by gasoline and is easy to wear. The air flue sprays, and the sprayer is installed in the branch department of intake duct, leads to the sprayer to arrange far away from the combustion chamber, and receives the influence that the sprayer was arranged, and the sprayer atomization effect is poor, the fuel utilization ratio is low.
Disclosure of Invention
In order to solve the technical problems, the invention provides the air inlet channel, the engine and the vehicle, under the condition of slightly increasing the cost, the atomization particle size of the fuel oil can be reduced by 1 time, the evaporation effect of the fuel oil in the air inlet channel is obviously improved, so that as much fuel oil as possible enters a cylinder to participate in combustion, and the economy of the engine is favorably improved.
The technical scheme adopted for achieving the purpose of the invention is that the air inlet channel comprises a main channel and two air passage branches, wherein the main channel is close to the air inlet end of the air inlet channel, the two air passage branches are close to the air outlet end of the air inlet channel, the two air passage branches are respectively provided with an oil injector mounting pipe for mounting an oil injector and an air inlet valve mounting pipe for mounting an air inlet valve, and the oil injector mounting pipes and the air inlet valve mounting pipes are respectively communicated with the air passage branches; the fuel injector mounting pipe and the intake valve mounting pipe are arranged at angles with the air passage branches respectively, an included angle exists between the axis of the fuel injector mounting pipe and the axis of the intake valve mounting pipe, and the included angle between the fuel injector mounting pipe and the air passage branches is smaller than that between the intake valve mounting pipe and the air passage branches.
Further, the air inlet comprises an upper molded surface and a lower molded surface, and the upper molded surface and the lower molded surface surround a cavity of the air inlet; the air outlet end of the upper molded surface is provided with a throat upper section; the lower molded surface comprises a straight line section, a fish belly section and a throat lower section which are sequentially arranged along the airflow direction, the throat upper section and the throat lower section form a throat of the air inlet channel, and the throat is used for being connected and fixed with a valve seat of an engine combustion chamber.
Further, the oil injector mounting pipe and the intake valve mounting pipe are sequentially arranged on the upper molded surface along the air flow direction; the sectional area of the air inlet channel is gradually reduced along the air flow direction.
Further, the intake duct has 7 cross-sections that are perpendicular to air current direction, first cross-section in 7 cross-sections is located in the intake duct with the region that the straightway corresponds, the fourth cross-section is located in the intake duct with the region that the fish belly section corresponds, the seventh cross-section is located in the throat, and along air current direction, the intake duct is in the cross-sectional area that 7 cross-sections department corresponds reduces in proper order.
Further, the cross-sectional areas of the first cross-section to the fourth cross-section are sequentially reduced by a reduction range of 2% -5%; the cross-sectional areas of the fourth cross-section to the seventh cross-section are reduced in sequence by a reduction range of 5-10%; the sectional area of the air outlet end is 50% -65% of the sectional area of the air inlet end.
Furthermore, the opening shape of the air inlet end of the air inlet channel is an ellipse, the straight line section is tangentially connected with the fish belly section at the transition position, and the fish belly section and the lower section of the throat opening are in arc transition.
Further, an included angle between the axis of the oil injector mounting pipe and the air passage branch is 25-33 degrees; the included angle between the axis of the inlet valve mounting pipe and the air passage branch is 60-70 degrees; the included angle between the axis of the fuel injector mounting pipe and the axis of the intake valve mounting pipe is 28-38 degrees.
Based on the same inventive concept, the invention also provides an engine which comprises the air inlet passage, wherein the oil injector and the air inlet valve of the engine are respectively arranged on the corresponding oil injector mounting pipe and the corresponding air inlet valve mounting pipe.
Further, the distance between the end part of the oil injector and the disc part of the air inlet valve is 50-80 mm; the end of giving vent to anger of intake duct is provided with the throat, the disk seat perpendicular to of the combustion chamber of engine the central line of throat, the intake duct includes profile and lower profile, go up the profile with lower profile surrounds the die cavity of intake duct, the sealed face of disk seat with contained angle between the profile is the acute angle down.
Based on the same inventive concept, the invention also provides a vehicle comprising the engine.
According to the technical scheme, the air inlet passage comprises a main passage and two air passage branches, the main passage is close to the air inlet end of the air inlet passage, the two air passage branches are close to the air outlet end of the air inlet passage, an oil sprayer mounting pipe used for mounting an oil sprayer and an air inlet valve mounting pipe used for mounting an air inlet valve are arranged on the two air passage branches, each oil sprayer mounting pipe and each air inlet valve mounting pipe are communicated with the air passage branch where the oil sprayer is located, under the same oil sprayer technical parameters, compared with air passage single spraying in the prior art, the oil spraying effect of the air passage double spraying can be improved by 1 time, the oil sprayer is not affected by the branching position of the air passage, the arrangement position is flexible, the oil sprayer can be guaranteed to be close to a combustion chamber as much as possible, the evaporation effect of the fuel oil in the air inlet passage is obviously improved, and as much fuel oil enters a cylinder to participate in combustion as much as possible. Sprayer installation pipe and (air) intake valve installation pipe are the angle setting with the air flue branch at place respectively, there is the contained angle between sprayer installation pipe and the (air) intake valve installation pipe, and the contained angle between sprayer installation pipe and the air flue branch is less than the contained angle between (air) intake valve installation pipe and the air flue branch, the sprayer installation pipe, the back that the sprayer spun fuel bundle fell the (air) intake valve can be guaranteed to the angle design between (air) intake valve installation pipe and the (air) intake valve three, and not on the intake duct wall, because the temperature of (air) intake valve is higher than air flue wall temperature, the fuel gets into the combustion chamber after evaporating more easily and participates in the burning, can promote the utilization ratio of fuel, compare traditional air flue single injection, be favorable to reducing the oil consumption.
Compared with the technical scheme that a fuel injector is adopted in the prior art, the fuel atomization effect of the engine and the vehicle provided by the invention can be improved by 1 time, the fuel injector is not influenced by the branch position of the air passage, the arrangement position is flexible, the fuel injector can be ensured to be close to a combustion chamber as much as possible, a fuel beam can easily enter the combustion chamber to participate in combustion after falling on the back of an air inlet valve and being evaporated at high temperature, air flow can rush into an air cylinder at a larger flow speed after the air inlet valve is opened and forms strong tumble flow by being matched with the air inlet valve, the combustion speed in the air cylinder can be improved, and the engine is favorable for the dynamic property and the economical efficiency.
The invention aims to solve the inherent defects of the prior art, adopts the technical scheme of air passage double injection, arranges two oil injectors on each cylinder through the air inlet passage, namely arranges one oil injector on each of two air passage branches of each air inlet passage, improves the atomization effect of fuel oil by 1 time, is not influenced by the position of air passage branches, has flexible arrangement position, can ensure that the oil injectors are close to a combustion chamber as much as possible, obviously improves the evaporation effect of the fuel oil in the air inlet passage, and ensures that as much fuel oil as possible enters the cylinders to participate in combustion.
Drawings
Fig. 1 is a schematic structural diagram of an air inlet provided in embodiment 1 of the present invention;
FIG. 2 is a side view of the air scoop of FIG. 1;
fig. 3 is a schematic layout diagram of an engine provided in embodiment 2 of the present invention;
fig. 4 is a schematic diagram of the air inlet structure of the engine in fig. 3.
Description of the drawings: 1-air inlet channel, 11-air channel branch, 12-straight line segment, 13-fish belly segment and 14-throat lower segment; 2-an inlet valve mounting tube; 3-installing a pipe of an oil injector, 4-a combustion chamber; 5-an intake valve; 6-oil injector, 61-oil beam spraying; a-a first cross-section; b-a second cross section; c-a third cross section; d-a fourth cross section; e-a fifth cross section; f-a sixth cross section; g-seventh cross section.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings.
The invention provides an air inlet channel, an engine and a vehicle, aiming at solving the technical problems of high direct injection cost, poor atomization effect of an oil injector in air channel injection and low air channel tumble ratio in the prior art. The invention is described in detail below with 3 specific examples:
example 1
As shown in fig. 1-2, according to the air inlet passage 1 provided by the present invention, the air inlet passage 1 includes a main passage and two air passage branches 11, the main passage is close to an air inlet end of the air inlet passage 1, the two air passage branches 11 are close to an air outlet end of the air inlet passage 1, the two air passage branches 11 are both provided with an injector installation pipe 3 for installing an injector 6 and an air inlet installation pipe 2 for installing an air inlet valve 5, each injector installation pipe 3 and each air inlet installation pipe 2 are both communicated with the air passage branch 11 where they are located, under the same technical parameters of the injector 6, compared with the air passage single injection in the prior art, the air passage double injection of the present invention can improve the atomization effect of fuel by 1 time, and the injector 6 is not affected by the branch position of the air passage, and the arrangement position is flexible, so as much fuel can be ensured to be close to the combustion chamber 4 as possible, and the evaporation effect of fuel in the air inlet passage 1 is significantly improved, so that as much fuel enters the cylinder to participate in combustion as much as possible. Sprayer installation pipe 3 and (air) intake valve installation pipe 2 are angle setting with the air flue branch 11 at place respectively, there is the contained angle between sprayer installation pipe 3 and the (air) intake valve installation pipe 2, and the contained angle between sprayer installation pipe 3 and air flue branch 11 is less than the contained angle between (air) intake valve installation pipe 2 and the air flue branch 11, sprayer installation pipe 3, the design of angle between (air) intake valve installation pipe 2 and the (air) intake valve 5 three can guarantee that 6 blowout fuel bundles 61 of sprayer fall on the back of (air) intake valve 5, and not on 1 wall of intake duct, because the temperature of (air) intake valve 5 is higher than air flue wall temperature, the fuel gets into 4 participated in the burning of combustion chamber after evaporating more easily, can promote the utilization ratio of fuel, compare traditional air flue single injection, be favorable to reducing the oil consumption. The included angle is not particularly limited and can be determined according to actual design requirements.
In order to ensure that the oil beam sprayed by the injector 6 falls on the wall surface of the inlet passage 1 and fully ensure the utilization rate of the fuel, in the embodiment, the included angle between the axis of the injector mounting pipe 3 and the inlet passage 1 is 25 ° to 33 °, for example, 26 °, 28 °,30 ° and 32 °, and further, the included angle between the axis of the injector mounting pipe 3 and the inlet passage 1 is preferably 25 ° to 30 °.
In order to reduce oil consumption and improve engine economy, in the embodiment, the included angle between the axis of the intake valve mounting pipe 1 and the air passage branch 11 is 60-70 degrees, such as 62 degrees, 64 degrees, 66 degrees, 68 degrees and the like; the angle between the axis of the injector mounting pipe 3 and the axis of the intake valve mounting pipe 2 is 28 ° to 38 °, for example, 30 °, 32 °, 34 °, 36 °, 37 °, and the like. Above-mentioned two contained angles can fully guarantee the back that the oil beam that 6 squirts of sprayer can be accurate falls on (air) intake valve 5, and not on (air) intake duct 1 wall, because (air) intake valve 5's temperature is higher than air flue wall temperature, the fuel gets into 4 participated in the burning behind the evaporation more easily, can promote the utilization ratio of fuel.
The invention improves the shape of an air inlet 1 simultaneously in order to improve the flowing state of mixed gas in a cylinder and form high tumble flow, and particularly: the air inlet channel 1 comprises an upper molded surface and a lower molded surface, the air outlet end of the upper molded surface is provided with a throat upper section, the lower molded surface comprises a straight-line section 12, a fish belly section 13 and a throat lower section 14 which are sequentially arranged, the upper molded surface, the straight-line section 12 and the fish belly section 13 are encircled to form a cavity of the air inlet channel 1, the throat upper section and the throat lower section 14 form a throat of the air inlet channel 1, the throat is used for being connected and fixed with a valve seat of the combustion chamber 4, the fish belly section is in a fish belly shape and has a certain change radian, and the interior of the fish belly section is constructed into a downward-sinking and relatively-expanding configuration. The shape of the lower profile is changed to enhance the guidance of the airflow and obviously improve the fluidity of the airflow, so that the airflow at the throat can rush into the cylinder at a higher flow speed after the intake valve 5 is opened, and the airflow is matched with the intake valve 5 to form strong tumble flow, thereby being beneficial to the dynamic property and the economical efficiency of the engine.
In order to gradually enhance the flowing speed of the air flow and increase the flow speed of the air flow entering the cylinder, in the embodiment, the oil injector mounting pipe 3 and the air inlet valve mounting pipe 2 are sequentially arranged on the upper molded surface along the air flow direction; along the air current direction, the sectional area of intake duct 1 reduces in proper order to guide the air flue, promote the air current velocity of flow. The reduction range of the cross-sectional area of each section of the air inlet 11 is not specifically limited, and the air inlet can be designed according to specific working conditions and requirements.
The final shape of intake duct 1 is directly decided to the big or small condition of 1 each section cross sectional area of intake duct, in order to control the cross-section reduction range of intake duct 1 to obtain the intake duct 1 of higher tumble ratio, in this embodiment, intake duct 1 has the cross-section of 7 perpendicular to air current direction, and the air current is different in the direction of each department in the intake duct, the air current direction of each cross-section perpendicular to position. The first section A is located the region that corresponds with straightway 12 in the intake duct, and fourth section D is located the region that corresponds with fish belly section 13 in the intake duct, and seventh section G is located the throat, and along the air current direction, intake duct 1 reduces in proper order in the cross sectional area that 7 cross-sections department correspond. The shape of the air inlet 1 can be gradually strengthened by 7 cross sections, so that the flow speed of the air flow entering the cylinder is increased, the specific positions of the 7 cross sections are not limited in the embodiment, but in order to make the shape change uniform, the 7 cross sections are uniformly distributed in the air inlet 1 as much as possible by utilizing the diversion, for example, the first cross section a and the second cross section B in the area corresponding to the straight line section 12, the third cross section C, the fourth cross section D and the fifth cross section E in the area corresponding to the fish belly section 13, and the sixth cross section F and the seventh cross section G in the area corresponding to the throat section 14.
The reduction range of the cross-sectional area of the air inlet 11 determines the shape, the tumble ratio and the flow coefficient of the air flow, is closely related to the performance of the engine, and can be properly adjusted according to the performance requirement of the engine. In this embodiment, the reduction range s of the cross-sectional area of the air intake duct 11 satisfies
Wherein k is a set coefficient, a is a tumble ratio, and b is a flow coefficient, that is, if a higher tumble ratio needs to be obtained, the reduction range s can be set larger, and if a higher flow coefficient needs to be considered, the reduction range s can be set smaller, and the specific design is not limited in the present invention.
In order to make the airflow at the throat enter the combustion chamber 4 at the maximum flow speed, in the embodiment, the cross-sectional areas of the first cross-section a to the fourth cross-section D are sequentially reduced by a reduction range of 2% -5%; the sectional areas of the fourth section D to the seventh section G are reduced in sequence by a reduction range of 5-10%; the sectional area of the air outlet end is 50-65% of that of the air inlet end. The shape structure of the air inlet channel 1 is controlled through the change of the cross section of the air inlet channel 1, the air inlet channel 1 can gradually enhance the flowing speed of air flow, the flow speed of the air flow entering a cylinder is improved, the air flow of the lower throat section 14 can rush into the cylinder at the maximum flow speed after the air inlet valve 5 is opened, and the air flow is matched with the air inlet valve 5 to form strong tumble flow, so that the flowing of mixed air in the cylinder is obviously improved.
In order to further enhance the guiding of the airflow and form better tumble, in the embodiment, the cross section of the air inlet end of the air inlet channel 1 is an ellipse, the straight line segment 12 is tangentially connected with the fish belly segment 13 at the transition, and the fish belly segment 13 and the throat lower segment 14 are in arc transition.
The invention designs the structure of the air inlet 1, optimizes the fuel injection effect, obviously improves the atomization effect of oil injection, has flexible arrangement position of the oil injector 6, has the high tumble ratio of the unique shape of the air inlet 1, has the tumble ratio of more than 2 and the highest tumble ratio of more than 2.5 under most of the lift range of the air inlet valve 5 through simulation calculation, obviously improves the flow of mixed gas in a cylinder, can improve the combustion rate in the cylinder, and is favorable for the dynamic property and the economical efficiency of an engine.
Compared with the in-cylinder direct injection technology, the invention greatly reduces the cost, is not easy to form carbon deposition and engine oil dilution, has good lubricating and cooling effects on the air inlet channel 1, adopts the injection pressure range of 3.5 bar-4.5 bar, does not need a special high-pressure oil pump, has low requirements on a nozzle and an oil rail, and has low risk of carbon deposition and engine oil dilution. Compared with the traditional air inlet 1, the fuel oil injection device has the advantages that the fuel oil injection device can reduce the atomization particle size of fuel oil by 1 time under the condition that the cost is increased by a small amount, the evaporation effect of the fuel oil in the air inlet 1 is obviously improved, the distance between the oil injector 6 and the air inlet valve 5 can be shortened as much as possible, the fuel oil consumption is reduced, the emission is improved, meanwhile, as much fuel oil as possible enters a cylinder to participate in combustion, and the economy of an engine is improved.
Example 2
As shown in fig. 3 to 4, the present embodiment provides an engine including the intake port according to embodiment 1, and an injector 5 and an intake valve 4 of the engine are provided on a corresponding injector mounting pipe 3 and an intake valve mounting pipe 4, respectively.
In order to reduce the oil consumption and improve the utilization rate of fuel, in the embodiment, the distance between the end part of the fuel injector 6 and the disk part of the air inlet valve 5 is 50-80 mm, and the design can ensure that the fuel beam 61 is sprayed on the air inlet valve 5 with higher temperature as far as possible instead of being sprayed on the wall surface of the air inlet channel 1, so that the fuel is evaporated and enters the combustion chamber 4 to participate in combustion.
The end of giving vent to anger of intake duct 1 is provided with the throat, in order to avoid the too big whole tumble intensity that weakens of reverse tumble, in this embodiment, the central line of disk seat perpendicular to throat of the combustion chamber of engine, intake duct 1 includes profile and lower profile, goes up the profile and encloses into the die cavity of intake duct 1 with lower profile, and the sealed face of disk seat is the acute angle with the contained angle between the lower profile.
The present invention is not particularly limited in kind and type of engine, and may be any engine of the prior art including a cylinder block and a cylinder head mounted on the upper surface of the cylinder block to seal the cylinder from the upper part and form a combustion chamber. It is often in contact with high temperature and pressure combustion gases and is therefore subjected to significant thermal and mechanical loads. The cylinder cover of the water-cooled engine is internally provided with a cooling water jacket, and a cooling water hole on the lower end surface of the cylinder cover is communicated with a cooling water hole of the cylinder body. Circulating water is used to cool high temperature parts such as a combustion chamber.
The air inlet valve 5, the exhaust valve, each oil sprayer mounting pipe 3 and each air inlet valve mounting pipe 2 are all arranged on a cylinder cover, a hole for mounting a spark plug is processed on the cylinder cover of the gasoline engine, and a hole for mounting an oil sprayer is processed on the cylinder cover of the diesel engine. The cylinder cover of the overhead camshaft engine is also provided with a camshaft bearing hole for mounting a camshaft. In the embodiment, the oil injector 6 and the intake valve 5 are respectively arranged on the corresponding oil injector mounting pipe 3 and the intake valve mounting pipe 2, the installation of the oil injector 6 is not influenced by the bifurcation of the intake passage 1, the arrangement position is flexible, the oil injector can be arranged at any position, the evaporation effect of the fuel oil in the intake passage 1 can be obviously improved by enabling the oil injector 6 to be close to the combustion chamber 4 as much as possible, and the fuel oil enters the cylinder to participate in combustion as much as possible. Other detailed structures of the engine can refer to relevant disclosures in the prior art, and are not explained herein.
Example 3
A vehicle comprises the engine provided by the embodiment 2, namely the engine of the vehicle adopts the air inlet channel 1 structure of the embodiment 1. The present invention is not limited to the type and type of the vehicle, and may be any vehicle in the prior art, such as a household trolley, a passenger car, a truck, etc., and other non-detailed structures of the vehicle may refer to the related disclosure in the prior art, which will not be described herein.
According to the engine provided by the embodiment 2 and the vehicle provided by the embodiment 3, due to the double-injection air inlet channel 1 in the embodiment 1, the fuel atomization effect can be improved by 1 time, the fuel injector 6 is not affected by the branch position of the air inlet channel, the arrangement position is flexible, the fuel injector 6 is 50-80 mm away from the disk part of the air inlet valve 5, the fuel injector 6 can be ensured to be close to the combustion chamber 4 as much as possible, the airflow of the lower throat section 14 can rush into the cylinder at the maximum flow speed after the air inlet valve 5 is opened, and is matched with the air inlet valve 5 to form strong tumble flow, the flow of mixed gas in the cylinder is obviously improved, the combustion rate in the cylinder can be improved, and the engine is favorable for the dynamic property and the economical efficiency of the engine.
Through the embodiment, the invention has the following beneficial effects or advantages:
1) Compared with the in-cylinder direct injection technology, the invention greatly reduces the cost, is not easy to form carbon deposition and engine oil dilution, and has good lubricating and cooling effects on the air inlet channel. Compare traditional intake duct injection, under the condition that the cost increases a small amount, the atomizing particle diameter of fuel can reduce 1 time, and the evaporation effect of fuel at the intake duct obviously improves for as much as possible fuel gets into the jar and participates in the burning, is favorable to improving engine economy.
2) The air inlet with the high tumble ratio in the unique shape enables air flow at the throat to rush into the air cylinder at the maximum flow speed after the air inlet valve is opened, and the air inlet is matched with the air inlet valve to form strong tumble, and through simulation calculation, under most of the lift range of the air inlet valve, the tumble ratio is larger than 2, the highest tumble ratio reaches more than 2.5, the mixed air flow in the air cylinder is obviously improved, the combustion rate in the air cylinder can be improved, and the air inlet with the high tumble ratio is favorable for the dynamic property and the economical efficiency of an engine.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. The air inlet channel is characterized by comprising a main channel and two air passage branches, wherein the main channel is close to an air inlet end of the air inlet channel, the two air passage branches are close to an air outlet end of the air inlet channel, an oil injector mounting pipe for mounting an oil injector and an air inlet valve mounting pipe for mounting an air inlet valve are arranged on the two air passage branches, and the oil injector mounting pipe and the air inlet valve mounting pipe are communicated with the air passage branches; the air inlet valve installation pipe is arranged in the air inlet pipe, the air injector installation pipe is arranged in front of the air inlet valve installation pipe, and the air injector installation pipe is arranged in the air inlet pipe.
2. The intake duct of claim 1, wherein the intake duct comprises an upper profile and a lower profile, the upper profile and the lower profile enclosing a cavity of the intake duct; the air outlet end of the upper molded surface is provided with a throat upper section; the lower molded surface comprises a straight line section, a fish belly section and a throat lower section which are sequentially arranged along the airflow direction, the throat upper section and the throat lower section form a throat of the air inlet channel, and the throat is used for being connected and fixed with a valve seat of an engine combustion chamber.
3. The intake duct of claim 2, wherein the injector mounting tube and the intake valve mounting tube are disposed on the upper profile in the air flow direction in this order; the sectional area of the air inlet channel is gradually reduced along the air flow direction.
4. The intake duct of claim 3, wherein the intake duct has 7 cross-sections perpendicular to the direction of airflow, a first cross-section of the 7 cross-sections is located in a region of the intake duct corresponding to the straight-line segment, a fourth cross-section is located in a region of the intake duct corresponding to the fish belly segment, and a seventh cross-section is located in the throat, and the cross-sectional areas of the intake duct corresponding to the 7 cross-sections decrease sequentially along the direction of airflow.
5. The air inlet duct according to claim 4, characterized in that the cross-sectional areas of the first to fourth cross-sections decrease in sequence with a decreasing amplitude of 2% to 5%; the cross-sectional areas of the fourth cross-section to the seventh cross-section are sequentially reduced by a reduction range of 5% -10%; the sectional area of the air outlet end is 50% -65% of that of the air inlet end.
6. The air intake according to claim 2, wherein the air intake has an inlet end with an elliptical shape, the straight line segment is tangentially connected to the belly segment at a transition, and the belly segment and the throat lower segment transition in an arc.
7. The inlet duct according to any one of claims 1 to 6, characterized in that the angle between the axis of the injector mounting pipe and the air duct branch is 25 ° to 33 °; an included angle between the axis of the inlet valve mounting pipe and the air passage branch is 60-70 degrees; the included angle between the axis of the oil sprayer mounting pipe and the axis of the inlet valve mounting pipe is 28-38 degrees.
8. An engine comprising the intake duct according to any one of claims 1 to 7, wherein an injector and an intake valve of the engine are provided on the corresponding injector mount pipe and intake valve mount pipe, respectively.
9. The engine according to claim 8, characterized in that the distance between the end of the fuel injector and the disk part of the intake valve is 50mm to 80mm; the air outlet end of the air inlet channel is provided with a throat, a valve seat of a combustion chamber of the engine is perpendicular to the central line of the throat, the air inlet channel comprises an upper molded surface and a lower molded surface, the upper molded surface and the lower molded surface surround to form a cavity of the air inlet channel, and an included angle between a sealing surface of the valve seat and the lower molded surface is an acute angle.
10. A vehicle characterized by comprising the engine of any one of claims 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110739779.9A CN113482813B (en) | 2021-06-30 | 2021-06-30 | Air inlet channel, engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110739779.9A CN113482813B (en) | 2021-06-30 | 2021-06-30 | Air inlet channel, engine and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113482813A CN113482813A (en) | 2021-10-08 |
| CN113482813B true CN113482813B (en) | 2022-11-04 |
Family
ID=77937271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110739779.9A Active CN113482813B (en) | 2021-06-30 | 2021-06-30 | Air inlet channel, engine and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113482813B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109673A (en) * | 2021-11-25 | 2022-03-01 | 哈尔滨东安汽车动力股份有限公司 | High tumble inlet structure |
| CN115199398B (en) * | 2022-07-25 | 2023-12-19 | 东风汽车集团股份有限公司 | Engine capable of igniting compression ignition |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000234575A (en) * | 1999-02-12 | 2000-08-29 | Mazda Motor Corp | Fuel injection device for cylinder fuel injection type engine |
| DE10054014A1 (en) * | 2000-11-01 | 2002-05-08 | Bosch Gmbh Robert | Intake device for an internal combustion engine |
| CN201991666U (en) * | 2011-03-31 | 2011-09-28 | 浙江吉利汽车研究院有限公司 | Gas inlet passage of engine |
| CN111379649A (en) * | 2020-03-23 | 2020-07-07 | 重庆长安汽车股份有限公司 | Intake duct applied to high-compression-ratio direct-injection self-priming internal combustion engine |
| CN212642871U (en) * | 2020-07-21 | 2021-03-02 | 重庆长安汽车股份有限公司 | Air inlet passage structure, Miller cycle gasoline engine and vehicle |
-
2021
- 2021-06-30 CN CN202110739779.9A patent/CN113482813B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000234575A (en) * | 1999-02-12 | 2000-08-29 | Mazda Motor Corp | Fuel injection device for cylinder fuel injection type engine |
| DE10054014A1 (en) * | 2000-11-01 | 2002-05-08 | Bosch Gmbh Robert | Intake device for an internal combustion engine |
| CN201991666U (en) * | 2011-03-31 | 2011-09-28 | 浙江吉利汽车研究院有限公司 | Gas inlet passage of engine |
| CN111379649A (en) * | 2020-03-23 | 2020-07-07 | 重庆长安汽车股份有限公司 | Intake duct applied to high-compression-ratio direct-injection self-priming internal combustion engine |
| CN212642871U (en) * | 2020-07-21 | 2021-03-02 | 重庆长安汽车股份有限公司 | Air inlet passage structure, Miller cycle gasoline engine and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113482813A (en) | 2021-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113482813B (en) | Air inlet channel, engine and vehicle | |
| US6918372B2 (en) | Intake system of internal combustion engine | |
| US3874357A (en) | Method for the improvement of mixture formation in the cylinder of an internal combustion engine and internal combustion engine operated in accordance with this method | |
| JP3003339B2 (en) | Intake system for fuel injection type internal combustion engine | |
| US7051702B2 (en) | Intake apparatus for internal combustion engine | |
| US6848436B2 (en) | Internal combustion engine with blow-by gas recirculation system | |
| US20040065296A1 (en) | Engine intake apparatus | |
| JPH07119472A (en) | Intake device for engine | |
| US6904891B2 (en) | Intake system of internal combustion engine | |
| US6868823B2 (en) | Intake apparatus for internal combustion engine | |
| US6158410A (en) | Internal combustion engine with at least one injection device per cylinder | |
| KR101322870B1 (en) | Air supply distributor for an internal combustion engine | |
| US7150267B2 (en) | Intake port structure for internal combustion engine | |
| JPS6060009B2 (en) | Intake system for multi-cylinder internal combustion engine | |
| CN111005824A (en) | Intensified flow-guiding type large-flow injection device of gas fuel engine | |
| CN113685294B (en) | Air intake system and car | |
| US10196969B2 (en) | Exhaust device for engine | |
| CN111486034B (en) | Engine air inlet channel and engine | |
| CN111749784A (en) | Novel high-efficiency ignition engine | |
| CN113982791B (en) | Engine air inlet passage structure, engine and automobile | |
| CN212838141U (en) | Fuel injection system and engine | |
| CN111550332A (en) | Air flow spraying and disturbing device in cylinder of internal combustion engine | |
| JPS61201826A (en) | Intake device of internal-combustion engine | |
| CN220705822U (en) | Electric injection motorcycle air inlet pipe | |
| CN114000963B (en) | Engine air inlet passage structure, engine and automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |